Shears-grinder



A. T SCHEIWER AND D. FERGUSON.

SHEARS GRINDER. 7 APPLICATION HLED OCT. l3, l9l9l Patent-ed Sept. 13,1921.

2 SHEETS-SHEE] I.

glv mtoms 776: we?

fi mmov- A. T SCHEIWER AND D. FERGUSON.

SHEARS GRINDER.

APPLICATION FILED OCT. 18, 1919 Patented Sept. 13, 1921.

2 SHEETS-SHEET 2- UNITED STATES PATENT OFFICE.

SHEARS-GRINDER.

Specification of Letters Patent. Patentd Sept. 13, 1921,

Application filed October 18, 1919. Serial No. 331,613.

'10 (1]! 107mm it may concern Be it known that we, Annnnr T- So'rrmwnnand DAvin FnnousoN, citizens of the United States, residing at Erie, 1nthe county ot- Erie and State of. Pennsylvania, have invented certainnew and useful improvements in Shears-(hinders, of which the followingis a specification, reference being bad to the accompanying drawings.

This invention relates to an improved shear grinder, and an object ofthe invention is to provide a device of this kind for sharpening theshear blades either with a corru gated cutting edge or a plain shearingcuttin ed e.

Knotlier object of the invention is the provision of a grinding machineof this character wherein a pivoted frame is employed for supporting acarriage for the support of the shears, and means for manipulating theframe whereby the shear blades maybe provided with a plain shearingcutting edge or a corrugated shearing cutting edge.

A further ob'ect of the invention is to provide a very simple. efiicientand practical machine, which involves novel features of construction.

\Vhile the design and construction at pres' ent illustrated and setforth is deemed preferable, it is obvious that as a result of areduction of the invention to a more practical form for commercialpurposes the invention may be susceptible to changes, and the right tothese changes is claimed, provided they are comprehended within thescope. of what is claimed.

The invention comprises further features and combination of parts, aswill be l1ereinafter set forth. shown in the drawings and claimed.

In the drawings:

Figure 11. is a plan view of the improved grinder constructed inaccordance with the invention, showing a pair of shears supported uponthe carriage;

Fig. 2 is a viewin side elevation of a grinder;

Fig. 3 is an endview of the machine; and 5 Fig. 4 is a sectional view onthe line 4-4 of Fig. 2.

Referring more especially to the drawings, 1 designates the base of themachine, and rising upwardly from its opposite ends are standards oruprights 2. which carry the pivot pins 4. The base 1 is formed with alaterally projecting. portion 5, constituting a base or support for aconventional form of motor 6, which may receive current from anysuitable source of electrical supply. The

shaft of the motor 6 has mounted thereon a grinding stone 7 ablematerial. I

Mounted upon the pivot )ins 4 is a U- shapcd oscillatory frame 8 throughthe depending arms 9 of which the pivot pins 4 extend. The upperelongated part 10 of the oscillatory frame 8 is provided with bevelededges 11 converging downwardly. A carriage 12 is mounted upon theelongated portion 10 of the oscillatory frame 8 and is provided withconverging oppositely arranged beveled edges 13 cooperating with theedges .11, whereby a dominant carriage 12 may be guided upon theelongated part 10 ofthe frame 8. A gib 1.4 is interposed between certainof the beveled edges 11 and 13 in order to insure a proper fit of thecarriage on the elongated part 10 of the frame 8. By means of suitablescrews 15, the gib 14 may be adjusted, and held in position in order toprevent excessive binding, as the carriage is guided. The elongated part10 of the frame 8has an elongated guide slot 16 and extending downwardlythrough the slot is an arm 17, which is carried by and depends from adominant carriage 12.

A screw 18 is mounted in bearings 19 of the depending parts of thepivoted frame 8, and threads through the depending arm 17 of the carriagc 12. A collar 20 is secured by means of the pin 21 on one end ofthe screw 18 and cooperates with one of the depending parts of the frame8 to prevent longitudinal movement of the screw in one direction. A.hexagonal cam collar 22 is secured by means of a transverse pin 23 onthe other end of the screw. and cooperates with the other depending partof the frame 8 to prevent axial movement of the screw in the oppositedirection. In other words, the screw 18 is .swivelly mounted on thedepending parts of of emery or any other suitinwardly converging beveledguides 31 an auxiliary carriage 'that the carriage 12 moveslongitudinally which the hexagonal cam collar 22 cooperates, in order tovibrate the frame 8 back and forth. A plate 26 1s secured by screws 7 27on one end of the upright at one end of the-base, and is provided with aconcavity 28. One of the depending parts 9 of the oscillatory frame 8 onone of itsedges is provided with a concavity 29. Engaging theeoncavities 28 and 29 and interposed between one of the depending parts9 of the frame 8 and the plate 26 is a coiled expansi'on spring 80 .theaction of which holds the oscillatory frame i' such wise that thehexagonal cam collar 22 will at all times engage the edge of thepro]ect1on 24 of one of w 1ich are engaged bythe beveled edges 32 of thedove-tailed depending piece 33 of it will be noted upon the frame 8 ina'direction parallel with the, screw, while the. auxiliary carriage 3d.moves in a horizontal, direction at right angles to the movement of thedominant carriage 12 By these movements of the carriages, it is possibleto move the shears in a direction atright angles to the grinding surfaceof the emery stone. and also move the cutting edge of a blade of theshears toward and from the'grinding surface of p the emery stone,

the cooperating beveled edges'31 and A gib is arranged between certainof so 0.; in order to insure proper guiding of he auxiliary carriage,that is to say, 1n such wise as to prevent undue binding of the parts.By virtue of suitable screws 36 which are mounted in the dominantcarriage 12.

the gib may be adjusted in position i 'r iis' lr- A'plate 37 18 securedby means of screws 38 on one of the edges of the dominant carriage 12,and swivelly mounted in an up 'wardly projecting portion of the plate isa head 41 (which .is scoured to the screw by screw 39. Bymeans of acollar l0 and the the pin- 42) of the screw, said screw is mountedswivelly in the projecting part of the plate This screw has threadedengageinent with the carriage 34, therefore itis obvious that when thescrew is rotated in one direction or the other, the auxiliary carriagemay be moved in a direction at right angles to the movement of thedominant carriage 12. When the auxiliary carriage is moved in such adirection, the shears to be sharpened will be moved toward and from thegrinding stone.

The upper face of the auxiliary carriage near one end edge thereof has aslight bevcled portion or bearing 4-3, preferably coir stituting aclamping face. against which either one of the blades of a pair ofshears may be clampc h as clearly shown in Figs. 1 and I-hby means of aclamp ii. The clamp l is in the form of a plate and a portion of thisplate. adjacent one edge. is arranged at a very slight obtuse angle.This portion of the plate. designated by the numeral l5. forms aclamping fare l-(i in opposed relation to the clamping face 43. that isto say. in parallelisn'i therewith so as to engage the opposite face ofthe shear blade. The plate or clamp ii has a depending 'l'ulcruming lug17 adjacent the edge opposite the. bQHCPOI'l lODS -15 of the plate. Thislug l7 bears upon the auxiliary carriage. as shown clearly in Fig. 3. Ascrew 4-8 is carried by the auxiliary carriage in any suitable man nor,and passes upwardly through the clamp or plate 4-1 and is provided witha thumb nut 49. The opening of the plate 44 through which the screw. ibextends is slightly elongated so as to permit of a slight looscilcss orplay of the plate. so that by means of the thumb nut d9 the clampingface 46 may be drawn tightly into engagement with the shear blade.thereby holding the shcars firmly in position. The clamping plate ii iscut away as indicated at 50. thereby forming the arms 51. which carrythe clamping faces 46.

AS the dominant carriage is moved longitudinally upon the frame R byrotating the screw 18, the frame and the carriage. is given a vibratingIHOYQI'HGIlt. moving the cutting edge of the shear blade in a directionat right angles to the grinding stone. As the edge of the shear blade isbeing ground. it is obvious that the auxiliary carriage may be moved ina direction toward the grinding stone by rotating the screw 3.).

A plate 52 is secured by screws 5? to the base 1 near one end and in anupstanding part of this plate an adjusting and abutment screw 54 isthreaded. This adjusting and abutment screw is mounted in the plate 52relatively to one of the depending parts fl of the frame 8 so that byadjusting the screw in one direct-ion. it may be moved toward one edgeof one of the depending parts 9 of the frame 8 in engagement. therewith.so as to position the frame 8 in order to prevent contact of thehexagonal cam collar 22 with the edge 25. iVhen the frame 8 is sopositioned and under tension of the coiled expansion spring 30, theoscillatory frame 8 will be held firm and against a vibratory movement.When the frame 8 is so held, a plain cutting edge will be formed on theshear blade instead of a corrugated cutting edge.

The invention having been set forth, what is claimed as new and usefulis 1. In a grinding machine as set forth, the combination with a pivotedframe, of a supporting base frame therefor having a grinding membermounted thereon, a dominant carriage guided longitudinally upon thepivoted frame in a direction at right angles to the grinding edge of themember, a screw mounted in bearings of the pivoted frame and havingoperative connectionswith said dominant carriage, an auxiliary carriageguided upon the dominant carriage and movable in a direction at rightangles to that of the dominant carriage and toward the grind ing edge ofthe member, and means on the auxiliary carriage for clamping a shearblade with its cutting edge in osition at right angles to the grindingedge of the member.

2. In a grinding machine as set forth, the combination with a pivotedframe,of a supporting base frame therefor having a grinding membermounted thereon, a dominant carriage guided longitudinally upon thepivoted frame in a direction at right angles to the grinding edge of themember, a screw mounted in bearings of the pivoted frame and havingoperative connections with said dominant carriage, an auxiliary carriageguided upon the dominant carriage and movable in a direction at rightangles to that of the dominant carriage and toward the grinding edge ofthe member, means on the auxiliary carriage for clamping a shear bladewith its cutting edge in position at right angles to the grinding edgeof the member, and means for causing a vibrating movement of the pivotedframe as the screw is rotated.

3. In a grinding machine as setforth, the coml'iination with a pivotedframe. of a supporting base frame therefor having a grimling membermounted thereon. a dominant rarriage guided longitudinally upon thepivoted frame in a direction at right angles to the grinding edge of themember, a screw mounted in bearings of the pivoted frame and havingoperative connections with said dominant carriage, an auxiliary carriageguided upon the dominant carriage and movable in a direction at rightangles to that of the dominant carriage and toward the grinding edge ofthe member, means on the auxiliary carriage for clamping a shear bladewith its cutting edge in position at right angles to the grinding edgeof the member, and means for causing a vibrating movement of the pivotedframe as the screw rotated, said means comprising an abutment edge onthe base frame, a polygonal cam carried by the screw to cooperate withthe abutment edge, and spring means for operating on a part of thepivoted frame to move the camin engagement with said abutment edgewhereby as the screw is rotated, the pivoted frame will receive avibrating movement.

4. In a grinding machine as set forth, the combination with a pivotedframe, of a supporting base frame therefor having a grinding membermounted thereon, a dominant carriage guided longitudinally upon thepivoted frame in a direction at right angles to the grindingedge of themember, a screw mounted in bearings of the pivoted frame and havingoperative connections with said dominant carriage, an auxiliary carriageguided upon the dominant carriage and movable in a direction at rightangles to that of the dominant carriage and toward the grinding edge ofthe member, means on the auxiliary carriage for clamping a shear bladewith its cutting edge in position at right angles to the grinding edgeof the member, means for causing a vibrating movement of the pivotedframe as the screw is rotated, said means comprising an abutment edge onthe base frame, a polygonal cam carried by the screw to cooperate withthe abutment edge, spring means operating on a part of the pivoted frameto move the cam in engagement with said abutment edge whereby as thescrew is rotated, the pivoted f'ame will receive a vibrating movement,and means for adjusting the pivoted frame against the action of thespring means to hold the earn from engagement withsaid abutting edge toprevent a vibrating move ment of the pivoted frame, whereby a plainshearing or cutting edge will be'imparted to the shear blade. i

In a grinding machine as set forth, the combination with a sup 'iortingbase frame, of a second frame pivotally mounted on the base frame, meansfor operatively support ing a shears blade on the pivoted frame formovement in a direction at right angles to the grinder shaft and alsofor movement on the frame parallel to the grinder shaft, a mechanismoperatively connected with said meansfor giving it said movement in adirection parallel to the grinder shaft, and means engaging the pivotedframe and to operating with the base frame for vibrating the pivotallymounted frame, and a device to operatively engage with the pivoted frameto hold the pivoted frame out of contact with said last mentioned meansto prevent the pivoted frame from vibrating.

6. In a grinding machine as set forth, a supporting base having agrinding member mounted thereon, a frame pivoted on the base, meansoperatively supporting a shears blade on the pivoted frame, whereby itmay move in a direction at right angles to the grinder shaft, a rotatingelement mounted in the pivoted frame and operatively connected to themeans for movingthe same in a direction parallel with the grinder shaft,means carried by therotating element and adapted to operatively engagewith a part of the base for vibrating the pivoted frame, whereby thegrinding member may impart. an ,unduiated cutting edge to the shearblade, spring means operatively' connecting with the pivoted frame tohold the means carried. by the rotating element rotatably in contactwith a part of the base.

7. In a grinding machine as set forth, a supporting base having agrinding member mounted thereon, a frame pivoted on the base, meansoperatively supporting a shears blade on the pivoted frame, whereby itmay move in a direction at right angles to the grinder shaft, a rotatingelement mounted in the pivoted frame and operatively connected to themeans for moving thesame 111 a direction pa 'allel with the grindershaft, means carried by the rotating element and adapted to operativelyengage with a part of the base for vibrating the pivoted'frame, wherebythe grinding member may impart an undulated cutting edge to the shears.blade, spring means operatively' connecting. with the pivoted frame tohold the means carried by the rotating element rotatably in contact witha part of the base,'.and means mounted on the base to operativelyengagethe pivoted frame for disposing said; frame to prevent the device fromoperatively engaging said base so as to hold the pivoted frame againstvibration,

wherebya straight cutting'edge may be imparted tothe shears blade.

' 8..In a grinding machine as set forth, a supporting base frame havingabutments, a second framepivoted on the base frame for pivotal movementsin a direction transversely of. the base frame, a rotating shaft mountedin bearings onthe base frame to one side of and in parallelism with thepivotedframe and carrying agrinder, means for operatively supporting ashear blade on the pivoted frame formovement in a direcjtion at rightangles to the grinder, a screw swiveled in. the pivoted frame for rotarymovement and adapted to be manually operated,-means operativelyconnectmg said screw and the shear blade supporting means, whereby theshear blade supporting means may be moved in a direction parallel withthe grinder shaft, a cylindrical collar on one end of the screw engagingone of the abutments, a hexagon collar secured on the other end of thescrew and having one of its faces bearing against the othe abutment, aspring engaging between a part of the base frame and pivoted frame tohold one of the faces of the hexagon collar in en gagen'ient with itsrespective abutment, whereby as the screw is rotated the pivoted framewill. vibrate and the shear blade supporting means will move parallelwith the grinder shaft.

S). in a grinding machine as set forth, a supporting base frame havingabutments, a second frame pivoted on the base frame for pivotalmovements in a direoiion trans versely of the base frame, a rotatingshaft mounted in bearings on the base frame to one side of and inparallelism with the pivoted frame and carrying a grinder, means foroperatively supporting a shear blade on the pivoted frame for movementin a direction at right-angles to the grinder, a screw swiveled in thepivoted frame for rotary movement and adapted to be manually operated,means mcrativclv connecting said screw and the shear blade supportingmeans, whereby the shear blade supporting means may be moved in adirection parallel with the grinder shaft, a cylindrical collar on oneend of the screw engaging one of the almtments, a hexagon collar securedon the other end of the screw and having one of its faces bearingagainst the other abutment. a spring engaging between a part of the baseframe and pivoted frame to hold one o f the faces of the hexagon collarin engagement with its respective abutment. whereby as the screw isrotated the pivoted frame will vibrate and the shear blade supportingmeans will move parallel with the grinder shaft, and adjustabfe meansadapted to engage the pivoted frame for moving the same to disengage thecollars from said abutments, whereby the shear blade supporting meansmay be moved without vibrating the pivoted frame.

In testimony whereof we hereunto ailix our signatures.

Aid EE RT 'i. N I l E i \Vl l'li. DAV 1D FE YGUSON.

